Trap.



PATENT'ED JUNE 20, I905.

E. H. GOLD.

TRAP.

APPLIOATION FILED FEB.10.1905.

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PATENTBD JUNE 20, 1905.

' E. H. GOLD.

TRAP.

APPLICATION FILED FEB.10,1906.

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No. 792,700. PATENTED JUNE 20, 1905. B. H. GOLD.

TRAP:

APPLICATION FILED FEB-10,1905.

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. NITED STATES Patented June 20, 1905.

EGBERT H. GOLD, OF CHICAGO, ILLINOIS.

TRAP.

SPECIFICATION forming part of Letters Patent No. 792,700, dated June 20, 1905.

Application filed February 10, 1905. Serial No. 245,093.

To on whom it may concern:

Be it known that I, EGBERT H. GoLD, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Traps, of which the following is a specification.

My invention relates to improvements in traps for automatically permitting the discharge of water of condensation, while preventing the waste of the heating fluid.

The object of my invention is to provide an improved trap of this character which shall be especially adapted to meet the conditions and exigencies of car-heating service, where it will occupy a minimum space, shall be re liable, cannot be readily frozen or otherwise obstructed, and may be quickly and effectively cleared out whenever by any possibility it may become obstructed with ice, small bits of hose, or other foreign matter. These and such other objects as may hereinafter appear are attained by my present invention, a convenient embodiment of which is shown in the accompanying drawings as applied to a carheating system.

In the accompanying drawings, Figure 1 shows diagrammatically a car-heating system. Fig. 2 is an enlarged horizontal sectional View of one embodiment of my improvement. Fig. 3 is a sectional view on the line 3 3 of Fig. 2 looking in the direction indicated by the arrows, and Fig. 4 is a sectional view on the line 4 4 of Fig. 2 looking in the direction indicated by the arrows.

Like characters of reference indicate the same parts in the several figures of the drawings.

Referring to the accompanying drawings and for convenience describing my invention as applied to a car-heating system employing steam for the heating medium, 1 is the trainpipe, extending beneath the floor 2.

3 3 are the feed-pipes leading from the train-pipe to the radiating-pipes on each side of the car, respectively, communication between the feed-pipes and the radiating-pipes being controlled by hand-valves 4.

5 5 indicate the radiating-pipes on each side of the car, respectively, which connect by return-pipes 6 6 with the trap 7, from which blow-off pipes 8 8. controlled, respectively, by valves 9 9, lead to the atmosphere. The trap 7 is also provided with direct ports leading to the atmosphere, as is clearly shown in Fig. 2 and as is hereinafter described.

Steam from the train-pipe passes through the feed-pipe 3, the valve 4, into the radiatingpipes 5, and thence to the return-pipe 6 to the trap 7 whence the water of condensation escapes to the atmosphere, the escape of steam being prevented in the manner hereinafter shown. On the other side of the car the steam flows in like manner through the feedpipe 3, the valve 4, radiating-pipes 5, and return-piped.

Referring now to Fig. 2, it will be seen that the trap 7 comprises two halves, one of which connects with the heating system on one side of the car and the other of which connects with the heating system on the other side of the car; but said halves of the trap have no direct communication with each other. The return-pipe 6 leads to the inlet-chamber A, from which the blow-off pipe 8 leads to the valve 9. (Not shown in Fig. 2.) The inlet-chamber A communicates with the outlet-chamber B through a nipple C, passage through which is covered by a strainer D. The end of the nipple C which projects into the outlet-chamher B provides avalve-seatE, which is adapted to receive the valve F. From the outletchamber B an open port Gr leads directly to the atmosphere, while the chamber B communicates through a suitable passage with the diaph ragm-chamber H, within which is mounted an expansible diaphragm I, provided with a familiar form of shield J, to which is secured the stem K of the valve F. A spring L normally holds the valve F in open position, while a screw N provides means for adjusting the tension of the diaphragm I.

As steam enters the chamber A through the pipe 6, the valve 9 being normally closed, the steam passes through the nipple C and, filling the diaphragm-chamber H, expands the diaphragm and closes the valve F. As the diaphragm I cools it contracts and the spring L opens the Valve F, whereupon any accumulated water 'of condensation is discharged into the chamber B and escapes through the open port G, so that the diaphragm I is only subjected to the action of steam or hot vapor and is not brought in contact with the more or less heated water of condensation.

In the usual practice of car-heating it is common to have the radiating systems on each side of a car disconnected from each other, so that either side may supply heat, as desired, in comparatively mild weather, while in more severe weather both sets of radiating-pipes are utilized. It so happens, however, that from one cause or another water of condensation is liable to enter the idle pipes, because of a leaky inlet-valve or for other reasons, and gravitating a little at atime to the steamtrap it not infrequently happens that the trap connected with the radiating pipes which are not in use becomes frozen, so that when steam is turned on to that set of radiatingpipes the trap refuses to operate, water of condensation accumulates and finding no outlet not only more or less fills the pipe but becomes frozen and much trouble results. A main object of my present invention is to prevent this frcezing of the trap which is not in use, while at the same time not interfering with the effective operation of either trap when desired. I have accordingly, as shown, ar-

ranged the parts of one trap in offset relation to the other, so that while the inlet and outlet chambers A B of one side of the trap are separated from the corresponding chambers A B of the other side of the trap only by the metal partition X, thus making it impos sible for water to freeze in the chambers A B when there is live steam in the chamber A, and vice versa, nevertheless the diaphragmchambers H H are so set apart and exposed that there will be no such heating of either diaphragm-chamber because of its near situation to the opposite inlet-chamber as will interfere with the prompt contraction of the diaphragm, which is necessary for the effective operation of the trap. Therefore whenever either side of the apparatus is in operation the inlet and outlet chambers and the valve mechanism of the other side will be kept sulliciently hot to prevent freezing, while when both sides of the apparatus are in operation neither side will so heat the diaphragm-chamber of the other side as to interfere with the eflicient operation of the diaphragm. Inasmuch, however, as it may happen under unusual conditions that one of the parts of the sides of the trap may become frozen or may become plugged up with bits of hose or other obstructions, it is desirable that some means be provided whereby any such obstruction,

whether it be because of ice or other material,

. out any debris which may have accumulated in the trap.

While I have shown my invention embodied in its preferred form and described its preferred application, it is obvious that while it is peculiarly adapted for the application named it is not necessarily so limited and may be embodied in other forms without departing from the spirit of my invention.

I claim 1. A double trap so constructed and arranged that the fluid-passages of one trap member when not in operation will acquire sulficient heat directly from the other trap member when in operation to prevent freezing in the idle trap member, while at the same time the respective expansion members of each trap member are so exposed as not to be 0perativcly aifected by the heat so transmitted from one trap member to the other.

2. A double trap comprising two automatic traps so constructed and arranged that when one trap is idle and the other is in operation, the trap in active operation will impart sufficient heat to the idle trap to prevent freezing thereof, but will not operatively aflect the expansion member of the idle trap.

3. A heating system comprising two noncommunicating systems of radiating-pipes and a double trap connected with each of said systems of radiating-pipes, said double trap comprising two non-communicating thermostatic traps arranged in such relation to each other that when one system of radiating-pipes is idle and the other system is in operation, the trap connected with the system in operation will impart suflicient heat to the idle trap to prevent freezing therein, and means for separately controlling the supply of heating me dium to each of said radiating systems.

EGBERT H. GOLD.

Witnesses:

O. R. BARNETT, M. E. SHIELDS. 

